<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    let name = 'jar'
    let num = 123.123
    let str = `中文`
    // 拼接字符串
    // let age = 19
    // document.write('我今年' + age)
    let uname = prompt('请输入你的姓名:')
    let age = prompt('请输入你的年龄:')
    document.write(`大家好，我叫${uname}，我今年${age}岁了`)
    
  </script>
</body>

</html>